No description
ee87885343
This patch adds two minor improvements to the way cbfs-compression-tool parses the compression algorithm type that is passed through the -t option of the 'compress' subcommand. These improvements are intended to prevent accidents and unexpected behavior when using the cbfs-compression-tool, in particular in automated contexts such as a Makefile rule. In the first part of this patch, a return statement is inserted after the 'if (algo->name == NULL)' check of the compress() function. This causes the function to exit immediately and subsequently abort the program when the algorithm type was not detected correctly. Previously, execution would continue with the 'algo' pointer pointing to the zeroed out stopper entry of the types_cbfs_compression[] array. The ultimate effect of this would be to pass 0 as 'algo->type' to the compression_function() function, which happens to be the same enumeration value as is used for CBFS_COMPRESS_NONE, leading to a valid compression function result that matches the behavior of no compression. Thus, if a script calling cbfs-compression-tool compress contained a typo in the -t parameter, it would continue running with an unintended compression result rather than immediately exiting cleanly. In the second part of this patch, the strcmp() function is replaced with strcasecmp() when comparing 'algo->name' with the 'algoname' parameter that was passed to the compress() function. strcasecmp() uses an identical function signature as strcmp() and is thus suitable as a drop-in replacement, but it differs in behavior: rather than only returning a result of 0 when the two NULL-terminated input strings are character by character identical, the strcasecmp() function applies a weaker concept of identity where characters of the latin alphabet (hexadecimal ranges 0x41 through 0x5a and 0x61 through 0x7a) are also considered identical to other characters that differ from them only in their case. This causes the -t parameter of cbfs-compression-tool compress to also accept lowercase spellings of the available compression algorithms, such as "lz4" instead of "LZ4" and "lzma" instead of "LZMA". As an unintended but harmless side-effect, mixed-case spellings such as "lZ4" or "LZmA" will also be recognized as valid compression algorithms. (Note that since the character "4" (hexadecimal 0x34) of the "LZ4" compression type name is not part of the above-mentioned ranges of latin alphabet characters, no new substitutions become valid for that part of the "LZ4" string with this patch.) Change-Id: I375dbaeefaa0d4b0c5be81bf7668f8f330f1cf61 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/26389 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> |
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| 3rdparty | ||
| configs | ||
| Documentation | ||
| payloads | ||
| src | ||
| util | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .gitignore | ||
| .gitmodules | ||
| .gitreview | ||
| COPYING | ||
| gnat.adc | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc | ||
| README | ||
| toolchain.inc | ||
------------------------------------------------------------------------------- coreboot README ------------------------------------------------------------------------------- coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload. With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI. This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required. coreboot was formerly known as LinuxBIOS. Payloads -------- After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot. See https://www.coreboot.org/Payloads for a list of supported payloads. Supported Hardware ------------------ coreboot supports a wide range of chipsets, devices, and mainboards. For details please consult: * https://www.coreboot.org/Supported_Motherboards * https://www.coreboot.org/Supported_Chipsets_and_Devices Build Requirements ------------------ * make * gcc / g++ Because Linux distribution compilers tend to use lots of patches. coreboot does lots of "unusual" things in its build system, some of which break due to those patches, sometimes by gcc aborting, sometimes - and that's worse - by generating broken object code. Two options: use our toolchain (eg. make crosstools-i386) or enable the ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case). * iasl (for targets with ACPI support) * pkg-config * libssl-dev (openssl) Optional: * doxygen (for generating/viewing documentation) * gdb (for better debugging facilities on some targets) * ncurses (for 'make menuconfig' and 'make nconfig') * flex and bison (for regenerating parsers) Building coreboot ----------------- Please consult https://www.coreboot.org/Build_HOWTO for details. Testing coreboot Without Modifying Your Hardware ------------------------------------------------ If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU. Please see https://www.coreboot.org/QEMU for details. Website and Mailing List ------------------------ Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website: https://www.coreboot.org You can contact us directly on the coreboot mailing list: https://www.coreboot.org/Mailinglist Copyright and License --------------------- The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details. coreboot is licensed under the terms of the GNU General Public License (GPL). Some files are licensed under the "GPL (version 2, or any later version)", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other (GPL-compatible) licenses may apply. Please check the individual source files for details. This makes the resulting coreboot images licensed under the GPL, version 2.